A small van is much higher than a car and you should be aware of the size of the vehicle at all times.
Small vans do not turn on a sixpence! They are also longer than the average car. Make an allowance if your are manoevering in a tight space, or reversing
Use your mirrors at all times to be aware of vehicles around you
If you are carrying a heavy load, move more slowly than you would in your own car. A van carrying a heavy load takes longer to stop than a car.
Be aware of blind spots around your vehicle, take care when changing lanes, overtaking and look out for pedestrians and bicyclists